Electromagnetic relay.



E. A. REINKE.

ELECTROMAGNETIC RELAY.

APPLICATION FILED MAY l0, l9i5- 1,170,670. Patented Feb. 8, 1916.

mums mus. m mun" ummdm. o c.

- a prQyed-melee Specification of Letters Patent.

Application filed May 10, 19.15.. smai no. 27,192.-

- (To all-whom imi ag g ance-mt n :tlrat'LJflmu-asr: A. Reisiuc, United States. residing at 'eounty of. Monroe and .fewnfionk,have invented acertain 'ItflPlOYOllltllb in. Electro- V, ,p Rela-g of. "which the following .is awfull clear. noise; and exact description, re erence. he i g had to the aeeompanying drawings forming a part of this specifisat m r T nirention provides --an imgnetie relay. .ln most cases; sherew current impulse or, current ichang is-to lietrails-ferret]. from one cireuijtito' another; 'IglS desired that the trans-- .ferwbenade at th dHHl YlIHIHH' eelerit and a emineet-ion;tl at the respon- H fe'r-ringfdm e. be yllllltlfl of :1 xlnmm; i'wssiiu (ii-(lento function prope'rilyre. 't-ll-tlflgllwtllfiactuating impulse of current be abnormally brief or weak. {Pile-:4demaa'ul-z-ior :such a 'relay has been bmuglitggabout largely by increase in the 'HU.'I 11l ),(F..2l-'l'ld,

desirab e-1n s at present- 'liin'ited by thespeed an'd sensitivenss-2of. the-:. i%elays eontrollingi-lthe circuit 'Hence.anyimprovement in the operation" ofithe' relay entrains a very. large and beneficial result ins-general; operation of the system; r

'It isfth'e objcct-ofzthe present invention to provid e an infproved. eleet-romiagnetie relay which will embody to as great a degree as possible ithe' abovequalitiess.

" In t'he aeompanying drawings, I have illustrated'one specific embodiment in which my invention may appear.

Figure l is if side elevation of a relay em- 5 View of the same.

v ig. 4 is a fragmenta yoke shown in Fig. 4 and the contae s This parallel portion-mil e ten.

vconsiderable length of-sth'e (fore-*1 $0 a to to form a. support-"for =1frla't'e 'WlllCll is made 0f noirnra'gn'ti'cij 1 bodying my inventio Fig-.- 12; is,.-: a -?plan Fig ,3 isia fiiontelcea- -w F g- 4 i n el r tion-e h fame or yoke which forms t eeo'nne i'ngd' lobetwe'en the armatureandgthe eontacusiirin'g'fs. 60 Le is-fem 'nsitlatmg pin forming the-cor .Jeetifonj l ejt\ the joint between theg i ear 119' the movable armature and Fig. 5 is a frag-mpntae ;el'e'vato The relay shown i with the eentralzieoregli o ma lerial which is extended asf'mstrid at the rear of thew-rel n'iounting means for; i upon a suitable lllOLlll-ligb ael,

preferably made 1 -.o f?, rinsulzitingae-mwte The pole piece 6 preferably-f0 inedmnl of} rectangular bar ironaisnbol'te end of the core-1 asb: :me'a nsro bolt .7. The lower end ititlie pole pi'neesfi is bentoutwardly at forming: kOEf-Eliitension. generally pai'zillelzto th ISY) the core 1.. s uevided witha pole.piece fiwhieli is olteda'to the pole piece by meansbfitlrenrn '10 vhieh cooperates with a thr this pole piece in positron Ir ai n 1:- pole piece 9 is bent forward in the same general direction as the pole piece-1' to fommzi-{mrtion 11 generally para'lle allow the employmentx: fia irze jrniature which will-be shortand (villitherefore ihiwe very small inertim j 'l h earmature LJwh'n attracted to the pole -pie (5:16 closes h netic 1 path completely I-l 1e :.po 1 ;e -pie e and QareeXtendedaboee h *h"d The circuit Cha11gl'l'lg {ii1CCl1iiIll$lfi n "h-i'cl this case comprises two si lzrri sp .14 and 15 is supported 'npon llie1, 13 by means of the-bloek-pfnasty-la and the screw-bolt l7,-='The s rings 1 supported at apredetermineddista'nee'f the plate '13 by meahs df't'lie' insidating- 18 which have their lower ends seated in recesses in the plate 13 and which pass through holes in the springs 15. Ihe outer end of each spring 15 is perforated to receive. the reduced end of a pin of insulation 19' mounted upon the yoke 'or frame 20 which frame or yoke is pivoted to the armature 12. The insulating pin 19, shown more clearly in Fig. 4, is hollow for a part of its length and is adapted to slip over one of the projections 21, formed on the top part of the frame or yoke 20. suflicient projections 21 being formed on this yoke to allow for operation of five pairs of springs. Obviously a'greater number could be provided if desired. The odd number, of projections 21 is provided so that the resistance of the springs will always balanced on the yoke 20. The lower end of the yoke is provided with projections 22 turning inwardly so as to seat in holes in the side of the armature 12.

The pole piece ll and the armature 12 are.

.vided at their extremities with small hookshaped projections which interlock and prevent endwise movement. A metal clip 23 which surrounds three sides of the bars 11 and 12 prevents the hooks or ends from being disengaged. The'metal clip 23 is se-' curedv to the barll so as tominimize the weight and inertia 'ofthe movable parts. Theouter end of the armature 12' which is adjacent the end 8 of the front pole .piece is perforated to allow a, small adjusting bolt 24 to pass therethrough and into the end 8 of the pole piece. The bolt 24 is provided with a set-nut 25 to maintain the adjustment of the air-gap formed between the pole piece 6 and the armature 12. The windings 3 are provided with terminals 26 which project outwardly to about the same distance as the end 27 of the springs 14 and 15, thus providing-suitable means for attaching the circuit wires.

The armature 12 may be made much shorter than the core 1 without causing excessive leakage. The advantage obtained by making the armature 12 short is a reduction of the weight of the moving parts. The inertia is less and the sensitiveness will there fore be materially increased. 7

Attention is also called to the fact that the only point at which the magnetic circuit is broken is at the air-gap between the arma tureand the front pole piece. The open knuckle joint between the pole piece 11 and thearmature 12 always preserves a closed path for magnetic lines of force, the intimate relation between the ends of the two bars offering very slight reluctance to the lines of force. By employing the open frame 20 to actuate the springs 14 and Yo I am enabled to shorten the relay structure by a I considerable amount, at the same time securing ample surfaces between which the airgap is formed. The springs 14 and 15 are carried to the :lz'ulj length of the relay in order to obtain maximum sensitiveness with a minimum of resistance to movement. The relay, as constructed, is formed of the least possible number of parts, all of which can conveniently be manufactured without the employment of expensive machinery. The cost of assembling and adjusting the parts may also be very low.

The springs may be disengaged from the yoke 20 by raising the lower spring, 15 above 1 the top of the insulating pins 19 whereby the go yoke 20 may be swung outwardly exposing the contacts for inspection or repair.

I do not wish to be limited to the precise construction above described, as changes may readily be made in the structnre with out departing from the scope of the invention.

What I claim as new and desire to secure by Letters Patent is the following:

1. In a device of the class described, a magnetic core having pole pieces, one of said pole pieces extending parallel to said core and having its end formed into one-half of an overlapping rocking joint, an armature of shorter length than the length of the core, said armature having its one end formed into a cooperating halfof an overlapping. rocking joint and having its other end held adjacent said other pole piece and a winding upon said core.

' 2. In a-device of the class described, a magnetic core having pole pieces, one of said pole pieces extending parallel to said core, and having its end formed into one-half of an overlapping rocking joint, an armature-.105 of shorter .length than the length of the core, said armature having its one end formed into a cooperating half of an overlapping rocking joint and having its other end held adjacent said other pole piece and a clip for holding said halves of said overlapping joint in coijperat'ing relation.

3. In combination, a magnetic core, an L-shaped pole piece having one arm secured to one end of said'core, the other arm ofsaid pole piece extending substantially parallel with said core and having on its end one part of a rocking joint, an armature having a corresponding part of a rocking joint engaging the part on said pole piece, said rocking parts overlapping tov form a joint of low magnetic reluctance, a clip for holding said halves in cooperating relation, and a pole piece secured to the opposite end of said core, said pole piece having a flattened extremity adjacent the free end of said armature.

4. In combination, a magnetic core, an -L- shaped pole piece having'one arm secured to one end of said core, the other end of said pole piece extending substantiallyparallel with said core and having one part of an overlapping rocking joint upon the end thereof, an armature having a corresponding part of an overlapping rocking joint engaging the part on said pole-piece, aclip .L-shaped pole pieces,one of said pole pieces having an arm secured to onc'end of saidcore, the other end of-said pole piece extending substantially parallel with said core and havlng one part of an overlapping rocking joint thereupon, an armature having a corresponding part of said joint engaging the part on; said pole piece, a clip-for holding said halves in cooperating relation, said c being secured to said pole piece, the other end of said armature extending adjacent the end of the other pole piece, a bridge of nonmagnetic material secured to said pole pieces, contact mechanism mounted on said bridge, said contact mechanism being adapted to be operated by said armature and a light rec tangular frame pivoted on said armature and connected to said contact mechanism.

6. In combination, a magnetic core having L-shaped pole pieces, one of said pole pieces having an arm lying-substantially parallel with said core, one part of an overlapping rocking joint being formed on the end of said arm, an armature bar having a corresponding part of said joint enga g the part on said arm, means for hold ii g said halves in contact, the other end of said armaturc extending adjacent the other pole piece, a bridge of non-magnetic material secured to said pole pieces, spring contact mechanism mounted on said bridge, said contact mechanism comprising springs extending the full length of said bridge piece and a light rectangular frame pivoted to said armature, said frame embracing said adjacent pole piece and having insulated pins connected .to said contact springs I 7. In combination a magneticcore, pole pieces forsaid core, and an armature connecting isaid pole pieces, one of said pole second pole piece on said core coiiperating with said armature, said armature and said pole piece having their reduced ends overi lapping each other. 1

In witness whereof, I hereunto subscribe my name this lstdayof May A. D. 1915.

EUGENE A.'REINKE.

\Vitnesses:

XV. W. VAN 'VLEET, J. S. GIBsoN. 

